Conveyer canvas



Feb. 6, 1940. J E, NOVAK 2,189,080

CONVEYER CANVAS Filed June 11, 1938 JOSEPH E. NOVAK M Patented Feb. 6, C1940v UNITED STATES PATENT OFFICE f 2,189,080-", j Q

converse canvas 3 7 Joseph 'E..Novak, Berwyn, Ill. Application June 11; 1938, Serial Nor 213,207 soiaims. (01. 198-499) ends oflthe staples. or fastening means are bent or clamped.

1 It is an object of this inventionto provide a cross bars or slats which are secured to the canvas by means of staples which are driven through the canvas, through the fillings and through the outer metal faces of the cross bars or slats.

Itis also an object of this invention to provide a conveyer canvas having filled metal cross bars or slats which are rigidly secured to the canvas by means of staples-which project through the canvas and through the metal outer faces of the cross bars or slats to .produce a construction wherein the filled metal cross slats are rigidly secured to the canvas without danger of them pulling off, as they do in earlier'types of conveyer canvases, wherein the staples project through the canvas and only into thefilling -material of the cross bars or slats.

An important object. of this invention is to provide an improved and simplified form of con- 40 fastening means being tightly crimped over and clamped against the outer faces of the metal cross bars.

Other and further important objects of thisinvention, will be apparent from the. disclosures in the specification and the accompanying drawing.

The invention (in a preferred form) isillustrated in the drawing and hereinafter more fully described. l

On the drawing:

. Figure 1 illustrates va fragmentary isometric view of a conveyer canvas provided with filled metal cross bars or slatsv secured in place by fastening means projecting through the canvas and through the filled metal cross bars.

The invention is directed conveyer canvas having filled metal conveyer ings pulling out. A- construction is therefore pro- Figure 2 is an enlarged fragmentary top plan View of a portion of the conveyer canvasillustra'ting the ends of the fastening means projec te ing through themetal' cross bar and then bent over against the outerface thereof.

Figure '3is an enlarged end View of one of the conveyer canvas cross bars associated with a fragmentary portion of the conveyer canvas belt.

Figure 4 is a fragmentary detailed cross section taken along/onesi'de of the fastening means of the cross bar o'rslat 'shown'in Figure 3.

Figure 5 is a longitudinal vertical detailed section taken on the line VV of Figure 4.

As shown on the drawing: e

The reference numeral l indicates a strip of canvas or other suitable flexible material of a predetermined width and'length adapted to have the endportions thereof connected by any suitable type of connecting meansto" form a continuousconveyerbelt.

The conveyer canvas is provided at prede--- termined spaced intervals with transversely disposed conveyor slat mechanisms, each of which comprises a substantially rectangular cross-sectioned hollow metal tube or cross bar 2 including a closed top 3 and a bottom 4 provided with a longitudinal slot 5 extending throughout the length of the cross bar or slat. Each of the metal cross bars or slats 2 is filled with a composition filler 6, such' as rubber, asphalt or any other suitable filling material which may serve the purpose.

The improved typeof filled metal cross bars or slats are secured in place transversely across the outer face of the conveyer canvas belt I by means of an improved type of machine which not only cutsthe staples but punches the staples through the canvas, the filling material of the cross slats,

and the metal shells of said cross slats, and

finally bends over and clinches the projecting ends of the staples tightly against the outer faces of the metalv walls 3 of the cross slats 2. v I

As clearly illustrated in Figures 4 and 5, the filled metal cross slats 2 are secured to the canvas l by means of the U-shaped staples I, the arms of which projectthrough the canvas, through the slots 5 of the metal cross slats, through the filling material-6 of the slats, and finally through punched openings in the outer or top walls 3 of the cross slats to rigidly hold the cross slats and canvas secured togetherby clinching over the ends 8 of the staples to clamp tightly against the top walls 3, thereby producing a construction which rigidly holds the filled metal slats to the canvas without danger of the staples or fasten 1. In a binder canvas mechanism including a canvas strip, filled metal cross slats mounted transversely across the outer face of the canvas .strip at spaced intervals, and fastening staples. .projecting through the canvas and through the filled metal cross slats, with the ends of said staples bent over and tightly clamped against the outer faces of the metal cross slats.

. 2. In a binder canvas mechanism including a canvasbelt, slottedhollow cross slats positioned transversely across the outer face of the canvas belt, composition fillers disposed within the hollow metal crossslats, and fastening staplesprojecting through the canvas belt,- through the cross slats andthe fillers, and through the metal outerwalls of the cross slats, with the ends of said fastening staples bent over and crimped tightly againstv the outer faces of said cross slats.

3. A conveyer canvas structure including combination a longitudinally slotted metal cross i slat having a filler therein, and fastening means punched through the canvas, the filler and through the metal walls of the cross slat.

4. In a binder canvas mechanism including av canvas belt, a plurality of spaced tubular metal cross slats having slots therein, said slotted cross slats having the slotted portions thereof "positioned against the outer face of the canvas belt, plastic fillers engaged in vthe slottedcross slats, and staple fastenerspunchecl through the canvas belt, through the fillers I in the cross slats, and

through the walls of the metal cross slats, with the ends of the staple fasteners crimped tightly I against the exterior of the metal cross slats.

v5. In .a binder canvas belt structure includin acanvas belt, an elongated metal slat disposed the free endsthereof disposed in spaced opposed relation to define a longitudinalslot bounded by onsaid belt and extending transversely thereof I said slat being formed of a piece of metal bentto-defines; substantially rectangular casing with spaced alignedv lips, a plastic fillervin said casing, and staple fasteners punchedthrough the belt I and through sai d filler, and through a wall ofthe casing to draw a portion of the belt into saidzsl'ot and: against said lips, and having their ends crimped tightly again st the exterior face of .a

wall :of said casing, 

